Science Flashcards
Never put chemicals back into the container to avoid contamination
Properly dispose of excess chemicals in liquid waste bottles.
Always wear safety goggles when working with glass, chemicals, or fire
Wash hands before and after experiments
Direct the openings of containers away from faces
Never use/touch chipped or broken glass
Do not eat or drink in the lab
Never directly smell chemicals; instead, waft the air toward the face
Do not taste chemicals
Keep water and objects away from electrical outlets
Always notify the teacher in the case of a spill or accident.
common safety practices
First aid kit - treat minor injuries
Fire extinguisher - put out flames on materials
Fire blanket - put out flames on a person
Goggles - protect eyes when using glassware or chemicals
Fume hood - pulls chemical gasses up and away from people
Body shower / Safety shower - wash chemical spills off a person
Eyewash station - wash chemicals out of a person’s eye
Common safety equipment
a standardized information sheet for a substance; includes information about health risks, safe disposal and cleanup of spills, and environmental risks
Any substance used in the classroom should have a physical or digital_________ accessible in the classroom
Material Safety Data Sheet (MSDS)
Wave the air toward the face. The safe way to smell a test tube.
Waft
The compound name, written out in words
Who made the sample
The date the sample was made
Hazards associated with the material
label all chemicals
recommended student behavior in a laboratory setting
reading and following experiment instructions
When is the best time to teach lab safety rules?
immediately before the students begin an experiment
Classroom animals must meet safety requirements such as ….
not being toxic
causing a danger to students
pet cages should be cleaned regularly with household bleach
Teachers should check for any students having allergies before choosing a classroom pet
Students should be taught to wash hands before and after any activity involving…..
plants, animals, or soil.
key principle of the scientific method is
the results to be tested and retested by other scientists
mnemonic phrase to help remember the prefixes, their factors of ten, and their abbreviations….
King - Kilo, 1000, km, kL, kg
Henry- Hecto, 100, hm, hL, hg
Died- Deca, 10, dam, daL, dag
by-[base units} 1, m, L, g
Drinking - Deci, 0.1, dm, dL, dg
Chocolate -Centi, 0.01, cm, cL, cg
Milk- Milli, 0.001, mm, mL, mg
a pair of equal fractions
proportion
Work areas should be kept clean before and after an experiment in completed
Equipment must be returned to its proper place
Follow directions exactly. If in doubt ask teacher for help
No running pushing or horseplay in the lab
Immediately notify your teacher if you get cut or have another injury when performing an experiment
Wash hands before and after each experiment
Injury prevention for students
Basic science tools that all scientist should know about …
Graduated cylinder- long container for measuring volume
Balance or scale - used for measuring weight and determining mass
Pipette- used to transfer a certain volume of liquid
Microscope- used to view all objects
Bunsen burner- creates a flame that is used for heating and sterilization
Test tube- containers that hold liquid in which chemicals can be mixed
Hot plates- used to heat objects
Beakers and Flasks- used to contain liquids
computers
dissecting tools
The ability to produce the same value or result
also can be thought of as the number of digits used to record a measurement
Precision
A measure of how close a measured value is to the true value
Accuracy
To distinguish between precision and accuracy
Imagine a target in which the bulls eye is our true value. If you shoot a few arrows and the land relatively close to the bulls eye but far apart from each other then this is an illustration of accuracy.
If your arrows land far from the bulls eye but all in a bunch where they are al close to one another, then this is an illustration of precision
A good scientific measure is both precise and accurate
Bulls eye analogy
The difference between computed estimated or measured value and the true value that is caused by random and inherently unpredictable fluctuations in the measurement instruments
Error
a prejudice usually of the investigator that can inhibit impartial judgement and can cause certain results to be more likely to happen than should be the case
can invalidate an experiment
bias
A way of representing information pictorially
Chart
Organizes numbers and info into columns and rows
Table
a type of chart which has an x and y axis used to represent the relationship between variables
Graph
Pictorial representation such as a drawing
Diagram
Ways that scientist communicate
Chart Table Graph Diagram written and oral reports
can be replaced as quickly as they can be used
ex: wind energy solar energy hydroelectric power
renewable resources
energy such as water wind and solar energy from the sun
commodities such as drinking water crops and wood
green energy
resources which will be depleted faster than they can be replenished
are gone once and used (or replenish too slowly to recharge )
ex: natural gas, petroleum
non renewable resources
a natural non renewable fuel source. derived from underground fossilized remains of living organisms
ex: coal oil and natural gas
minerals such as gold iron ore and titanium
fossil fuel
renewable resources ____ and nonrenewable ___
come back
do not
assess the relative danger of each chemical used in the classroom
label and store chemicals appropriately
implement saftey procedures for the use and handling of of materials and equipment
follow appropriate procedures for cleaning containers and disposing of chemicals
maintaining safety in the lab for chemicals
rules for keeping a live animal
feeding and handling is clearly understood
care for the animal in a humane manner \
animals found in nature should. not be kept as they pose a risk of disease and of attack such as biting
a plan for care must be made in advanced to holidays and vacations
the metric system of measurement used by most scientist is the _____ also known as the ____ or ____ because it is used in most countries to maintain consistency in measurements
ex: meters kilometers grams kilograms militers liters cubic centimeters
international systems of units
standard units
SI units
all living things are made up of cells and all cells have arisen from other existing cells
robert hooke (1635-1703) and henri dutrochet (1776-1847)
cell theory
continents on earth today were long ago formed together in a single landmass
Alfred Wegener (1880-1930)
Plate tectonics
1- an object at rest will remain at rest unless acted on by an unbalanced force. an object in motion continues in motion with the same direction unless acted upon by an unbalanced force. this is known as the law of inertia
2- acceleration is produced when force acts on a mass. The greater the mass the greater amount of force needed (to accelerate the object )
3- for every action there is an equal and opposite reaction
Isaac newton (1643-1727)
newtons laws of motion
every object in the universe attracts every other object with a force directed along the line of centers for two objects that is proportional to the product of their masses and inversely proportional to the square of the separation between the two objects
sir issac newton (1643- 1727)
universal gravity
the invention and development of systematic techniques and or tools for making and doing things
technology
______ is promoted through students engaging in hands on activities and experimentation
scientific inquiry
using the senses to obtain information from the environment
observing
talking drawing, electronic information, sharing and acting
communication
pairing judging similarities and differences and seeking one to one correspondence
comparing
grouping seriating and sequencing
organizing
determining cause and effect connecting concepts and grouping information
relating
using super ordinate subordinate classification using data to make assumptions employing if then reasoning and developing scientific laws
inferring
using knowledge to develop strategic plans invent new concepts and processes
applying
observing communication comparing. organizing relating inferring applying
are all apart of
science thinking skills
exploration- phase in which students assimilate infousing their senses
concept invention- phase in which students share their observations and findings
application - students connect the concept with what they observe in everyday life or what they already know
model developed by robert karplus
1- science must be taught in a way that is consistent with the nature science. science must be taught as an active process - as something we do
2- science teaching must be focused on the ability to think, promotes the students use of independent critical and higher level thinking abilities
3- science must be taught in a way that matches how students learn (mental functioning by piaget) Assimilation, accomodation, organization
three phase learning cycle (OG before the 5E model)
Engage
explore
explain - students present and share data with their classmates in teacher guided discussion of findings
elaborate- students use the new concept they have learned as it is applied in new contexts
evaluate
5E model
an overall increase in average global temperatures due to the green house effect (the increasing amount of carbon dioxide in the earths atmosphere trapping more heat )
global warming/ climate change
the process by which scientists analyze potential risks and benefits before conducting scientific investigations and experiments
risk assessment
in teaching science these kinds of questions are most effective.
these questions are framed in a way that asks students to reveal their thinking and explain their rationale for conclusions they may draw
from their experience
ex: what do you think ? why do you think that may be true?
probing questions
level 1 knowledge - recall factual info on command
ex: LIST LABEL WRITE
level 2 comprehension - communicate an idea in a different form
ex: EXPLAIN RESTATE SUBMIT
level 3 application- use what you need to find new solutions or apply in new situations
Ex: RELATE UTILIZE MAKING SURE OF
level 4 analysis - break things and ideas down into component parts and find their unique characteristics
ex: EXAMINE STUDY DEDUCE
level 5 synthesis- use what is known to think creatively and divergently
ex: CREATE BUILD DEVELOP
level 6 evaluation- use what is known to make judgements and ratings
ex: DECIDE MAKE A RULING RANK
taxonomy of the cognitive domain levels
all variables of the experiment remain constant except for the variable being tested
controlled experimentation
____ experiments increases reliability of the findings
reliability is established when the same or closely similar findings occur each time the experiment is repeated
repeated
measuring learning as it is occurring
allows teachers to adjust the intrustuction according to the student learning and potential difficulties in learning
authentic assessment
this assessment includes techniques such as verbal reports lab practical exams story writing developming advert contructing conept map writing essays play or skit creating drawings or models
alternative assessments
the key universal forces included in this section are
gravity
electricity
magnetism
magnitism is the force of attraction or repulsion between objects that results from the positive and negative charges of the objects
when poles of different kinds (north/south) are placed in close proximity they attract one another
the strength of the forces depends on the size and proximity of the magnets
the charged area around a magnet is called the magnetic field
earth is a large magnet bc of the north and south pole and the feild of attraction of earth
magnetism facts
the action of moving an object by pulling or pushing
can cause an object to move at a constant speed or accelerate
force
the product of the force acting in the direction of movement and causing displacement
work
the ability to do work
ex: when a tow truck uses force to pull a car and move it to a different location energy is being used and work is being accomplished
energy
has few or no moving parts and can change the size and directions of a force
ex: screw hammer wedge incline plane
seesaw is a lever
simple machine
two or more simple machines workinh together to facilitate work
ex: wheel barrow can opener and a bicycle
complex machine
__ and __ is what keep the sun earth moon and olanets in their orbits and explains the structure and changes of the changes the universe
force and motion
anything that takes up space and has mass
matter
the amount of matter in a n object or thing
causes the object to have weight
mass
the amount of space that matter takes up
volume
amount of gravitational force exerted over the object
weight